How to reduce generator noise?

The most fundamental way to reduce generator noise is to start from the sound source and use some conventional noise reduction technologies such as silencers, sound insulation, sound absorption, insulation vibrations, etc. are the most effective methods; \x0d\1. Reduce exhaust noise. Exhaust noise is the main source of noise from the unit. It is characterized by high noise level, fast exhaust speed and difficult management. Using a special impedance-type composite silencer can generally reduce exhaust noise by 40 to 60 dB(a). \x0d\2. Reduce axial flow fan noise. When reducing generator cooling fan noise, two issues need to be considered. One is the allowable pressure loss in the exhaust channel. The second is the required amount of noise reduction. For the ofFor the above points, resistive chip silencers can be used. \x0d\3. Acoustic insulation, sound absorption treatment and unit vibration isolation of the computer room\x0d\ (1) Acoustic insulation of the computer room. After the unit's exhaust noise and cooling fan noise are reduced, the main source of noise remaining is electrical and mechanical noise. The method adopted is to remove all windows except the necessary interior wall observation windows connected to the observation room, all holes and holes must be sealed tightly, and the sound insulation of the brick wall must be greater than 40 dB(a). The doors and windows of the computer room adopt fireproof and soundproof doors and windows. \x0d\(2) Air inlet and outlet. After the sound insulation treatment of the computer room, the problem of ventilation and heat dissipation in thehe computer room needs to be resolved. The air inlet must be placed on the same straight line as the engine block and the air exhaust outlet. The air inlet must be equipped with a resistive piece silencer. Since the pressure loss at the air inlet is also within the allowable range, the air volume entering and leaving the engine room can be naturally balanced, and the ventilation and heat dissipation effect is obvious. \x0d\(3) Sound absorption treatment. All five walls of the engine room, except the floor, can be treated with sound absorption. According to the spectral characteristics of the drive unit, a perforated plate resonance sound absorption structure is used. \x0d\ (4) Indoor air exchange and good sound insulation of the engine room will prevent the air in the room from convection when the engine block is stopped, and the high temperature in the room will not causewill not be lowered in time. Low noise axial flow fans can be used. Combined with a resistive chip silencer, the problem can be solved. \x0d\(5) Vibration isolation of the unit. Before installation of the engine block, vibration isolation treatment should be carried out in strict accordance with the relevant information provided by the manufacturer in order to avoid long-distance transmission of structural noise and continuous radiation of airborne noise during propagation, making it impossible to obtain noise levels at the plant boundaries. For existing generator sets that require treatment due to exceeding standards, ground vibration conditions near the unit should be measured. If the vibration is obvious, the generator set should first be subjected to vibration isolation treatment.